Mechanism for holding crank-shaft pins in turning-lathes.



A. TINDBL,

DING'CRANK SHAFT PINS INTURNING LATHES.

MECHANISM FOR HOL v APPLIOATION FILED NOV. 0, 1905.

.l2 /3 M /s WITNESS-55.; I I nwavram- I A; MM Bjy PATENTED JAN. 22,19,07.

UNITED STATES PATENT OFFICE. ADAMJTINDEL, or PHILADELPHIA, PENNSYLVANIA,ASSIGN'OR TO TINDEL MORRIS ooMPANY, or EDDYSTONE, PENNSYLVANIA, ACORPORATION .OF PENNSYLVANIA.

MECHANISM For- HOLDING CRANK-SHAFT Pmsm TURNING-LATHES.

Specification of Letters Patent.

. Patented Jan. 22, 1907.

To all whom it may concern: Be it known that'I, ADAM TINDEL, a citizenof the United States, residing at- Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented new and usefulMechanism for Holding Crank- Shaft Pins in Turning; athes, ofwhich thefollowing is. a specification.-

This invention is a detail improvement on to the construction shown inLetters Patent of the United States N 0. 666.040, dated J anuary 15,1.901, and. it is more particularly a species of chuck carried byarevolving ring, whereby an intermediate crank of a cra 1kshaft can befirmly gripped close to the pin and supported close to the ring, so thatin -the operation of turnin the pin. is held firmly in the center ofrevolution without vibration or sagging, which commonly takes place in'20. mechanisms of this class heretofore employed,

In the accompanying drawing is shown a 'pers ective viewof theinvention'with the chuc' engaging an intermediate crank of a crankshaft,the turning-tool being moved '2 5 aside for the purpose of betterillustrating the features of the invention.

As shown 'in the drawin the invention comprises a yoke 1, movablblongitudinally .on the lathe-shears 2 and secured in the de- 3 .siredposition in any suitable manner, as by clamps 3 and bolts 4. Revolublysupported. within the yoke is a carrier in the form of anexternally-toothed or spur ring 5, adapted to be revolved by a pinion 6,the latter being splined on the shaft 7 so'as to be movablelongitudinally thereon and revoluble thereby. Fixed to the face of thering 5 is a bar 8,

having sleeved thereon the angular jaws 9, which are adjustable on thebar and adapted to be fixed thereto by the set-screws 10. These jawshave a bolt 11 passed therethrough parallel and close to thebar,'whereby the jaws are firmly clamped to a crank 12 .in line with thepin 13 of a crank-shaft 14, extending through the ring, the pin beingheld and revolved with its axis coincident with the axis of revolutionof the ring during the operation of turning the pins surfaceibythetool15.' i

This construction has been found to provide satisfactory means forovercoming in a simple manner the difficulties heretofore found inholding intermediate cranks so that the pins thereof can beturnedwithout trembling or deviating from the desired lposition,

Having described my invention, claim-- 1. A revoluble carrier with anopenin therethrough, a bar fixed to said carrier and disposed acrosssaid opening, jaws adjustable on and. fixable to said bar, and means forclamping said jaws to the work.

i 2. A yoke, atoothed ring revoluble in said yoke, a pinion engaging andrevolving said. ring, a bar extending across and fixed to'said ring, apair of jaws sleeved on said bar and. fixable thereto; and means forclamping said jaws to the Work.

In testimony whercof I have hereunto set my hand, this 17th day ofNovember, 1905,

inthepresence of the'subscribing witnesses. 7o

ADAM TINDEL. Witnesses:

' WLELLIOTT HAZZARD,

G. N. CRIsPIN.

